package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.*;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 将前端传来的密码进行md5加密
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 添加员工
     * @param employeeDTO
     */
    @Override
    public void addEmployee(EmployeeDTO employeeDTO) {
        //将dto转换为对接数据库的实体
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置密码，经过md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置创建时间，更新时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());

        //从ThreadLocal中获取当前登录用户的id
       // Long curEmployeeId= BaseContext.getCurrentId();
        //employee.setCreateUser(curEmployeeId);
        //employee.setUpdateUser(curEmployeeId);

        //设置账号的状态为正常状态
        employee.setStatus(StatusConstant.ENABLE);

        //将该员工添加到数据库
        employeeMapper.insert(employee);
    }

    @Override
    public PageResult employeePageSelect(EmployeePageQueryDTO employeePageQueryDTO) {
        //开启分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        //从mapper层进行条件查询
        Page<Employee>page =employeeMapper.employeeSelectByName(employeePageQueryDTO.getName());

        //返回查询的结果
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee=new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public Employee selectById(Long id) {
        return employeeMapper.selectById(id);
    }

    @Override
    public void updateEmployee(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //employee.setUpdateUser(BaseContext.getCurrentId());
        //employee.setUpdateTime(LocalDateTime.now());

        employeeMapper.update(employee);
    }

    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        //前端并没有传递empId参数，选择从ThreadLocal中获取
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        //从mapper层查询出这个员工
        Employee employee = employeeMapper.selectById(passwordEditDTO.getEmpId());

        //旧密码错误
        if(!DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes())
                                                    .equals(employee.getPassword())){
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        //修改密码
        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));

        //设置修改人
        //employee.setUpdateUser(BaseContext.getCurrentId());

        //设置修改时间
        //employee.setUpdateTime(LocalDateTime.now());


        //完成修改
        employeeMapper.update(employee);
    }

}
